<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Cloud
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/**
 * Abstract factory for Zend_Cloud resources
 *
 * @category   Zend
 * @package    Zend_Cloud
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Cloud_AbstractFactory {
	/**
	 * Constructor
	 *
	 * @return void
	 */
	private function __construct() {
		// private ctor - should not be used
	}
	
	/**
	 * Get an individual adapter instance
	 *
	 * @param  string $adapterOption
	 * @param  array|Zend_Config $options
	 * @return null|Zend_Cloud_DocumentService_Adapter|Zend_Cloud_QueueService_Adapter|Zend_Cloud_StorageService_Adapter
	 */
	protected static function _getAdapter($adapterOption, $options) {
		if ($options instanceof Zend_Config) {
			$options = $options->toArray ();
		}
		
		if (! isset ( $options [$adapterOption] )) {
			return null;
		}
		
		$classname = $options [$adapterOption];
		unset ( $options [$adapterOption] );
		if (! class_exists ( $classname )) {
			require_once 'Zend/Loader.php';
			Zend_Loader::loadClass ( $classname );
		}
		
		return new $classname ( $options );
	}
}
